Ceiling tile with built-in air flow mechanism and UV air purifying device

ABSTRACT

Disclosed embodiments relate to a combination axial fan and LED lighting system configured to fit into the footprint of a standard ceiling tile. Disclosed embodiments further include ceiling tiles with a built-in fan and/or LED lighting. The disclosed systems may include a housing container and an axial fan. The fan has a fan cavity including air diversion mechanism to direct air from the fan cavity toward the lighting and fan components. The inventions include an airflow surface to direct air existing the fan cavity along an LED light fixture. Moreover, disclosed embodiments include one or more UV light sources which irradiate contaminants as air flows through the ceiling tile.

This application is a continuation of application Ser. No. 16/157,874filed on Oct. 11, 2018 which is a continuation-in-part of applicationSer. No. 16/040,189, filed on Jul. 19, 2018, issued as U.S. Pat. No.10,221,857, which is a continuation-in-part of application Ser. No.15/589,367, filed on May 8, 2017, issued as U.S. Pat. No. 10,247,191,which is a continuation-in-part of application Ser. No. 15/471,762,filed on Mar. 28, 2017, issued as U.S. Pat. No. 10,006,619, which claimspriority from Provisional Patent Application Ser. No. 62/439,719 filedDec. 28, 2016.

FIELD OF THE INVENTION

The present inventions relate to ceiling tiles with built in air flowmechanisms and optional LED lighting, for maintaining proper air qualityand air movement in an indoor environment. Embodiments of the inventionsfurther include a UV light source which decontaminates air as it flowsthrough the ceiling tiles and thus helps prevent the spread of bacteria,fungus, viruses and/or mold, etc.

BACKGROUND OF THE INVENTION

Indoor spaces such as offices, hospitals, retail stores, educationalinstitutions and the like have two main issues: (1) maintaining properair quality and air movement; and (2) providing adequate lighting.Indoor spaces often have only a single HVAC system that provides air andheat to all of the different sized offices or rooms within a space.Separately, the indoor space utilizes a series of LED lights that aremounted in ceiling tiles having a dimension of 2 ft.×2 ft. or 2 ft.×4ft. There is a need for a system which can move air within an indoorspace which supplements the primary HVAC system while at the same timeproviding ample lighting within the indoor space while fitting into thedimensions of a ceiling tile. The system also can provide a coolingeffect on the LED lights to prolong the life-span of the lights.

According to the U.S. Department of Energy (DOE), more than 360 milliontroffers provide general lighting in commercial building interiors. Withtheir standard dimensions of 2 ft.×4 ft., 1 ft.×4 ft. and 2 ft.×2 ft.,these luminaires are popular in dropped, acoustical-tile ceilings with alow ceiling height (less than or equal to 9 feet). The installed trofferbase is predominantly linear fluorescent. In recent years, thedevelopment of LED technology has resulted in a broad selection ofproducts designed to challenge fluorescent, offering up to 70 percentenergy savings, longer life and controllability.

There does exist a problem with LED lights. Excessive heat causes damageto LED lights. LED bulbs that produce white light typically generateexcessive heat that must be conducted away from the LED light system.Proper thermal management is critical to maintaining the originalbrightness and extending the lifespan of LED lights. Unfortunately, dueto component costs, many manufacturers do not include the materials orstructures necessary to provide proper heat transfer, thereby reducingthe performance of the product. For example, most LED lightingmanufacturers use less expensive and less reliable circuit boards thatdo not transfer heat well. Heat build-up in LED lights will damage thematerial, decrease the effectiveness of the light and decrease thelifespan of the lighting unit.

The secret to extending the useful life of an LED fixture is properthermal management. There are several factors that affect the thermalperformance of any fixture including the ambient air temperature, butLEDs specifically suffer from improper thermal design. The displacementof waste heat produced by LED lights is paramount to the longevity ofthe LED lights and can provide an advantage to a company in the emergingLED lighting industry.

The energy consumed by an incandescent bulb produces around 12% heat,83% infrared radiation and only 5% visible light. A typical LED lightproduces 15% visible light and 85% heat. It is important to dissipateheat from LED's through efficient thermal management. The operatingtemperature of an LED light affects the lifespan of the LED. LED lightsdo not tend to fail catastrophically, instead the lumen output of theLED decreases over time. Elevated internal temperatures of the LED causeaccelerated deterioration of the LED lights.

One of the major complaints levied by people working in an office,school, hospital, or commercial space concerns the temperature in thespace. Complaints about temperatures are not just a matter of employees'preferences and tolerances. Temperature has been found to have a directcorrelation to productivity. It is believed that productivity is linkedto the temperature of the building. In addition to temperature issueswithin a building, employees may experience headaches, dizziness,nausea, irritation, cough, fatigue, asthma and other symptoms due towhat has been termed “sick building syndrome.” The primary sources ofindoor air quality problems are believed to be inadequate ventilationand contamination from within the building.

Further, in an office or indoor environment, the absence of adequateventilation causes irritating or harmful contaminants to accumulate,which causes worker discomfort, health problems and reduced performancelevels. Such harmful contaminants include bacteria, fungus, mold orviruses that can cause people to become sick. There is a need for an aircirculation mechanism which reduces airborne contaminants. Airpurification is an important part of an HVAC system. A typical indoorHVAC system is not a substitute for source control or ventilation.

There is also a need to create what is called a virus or bacteria killchamber. The kill chamber, or kill zone, must be self-enclosed such thatany UV light source does not exit the kill chamber.

Moreover, it would be advantageous for an air circulation mechanism tofit within the footprint of a typical ceiling tile.

SUMMARY OF THE INVENTION

The present inventions relate to a ceiling tile with a built-in fan forcirculating air. Embodiments of the inventions may further include oneor more LED strips for lighting the environment in which the ceilingtiles are installed. Further yet, embodiments of the invention mayinclude one or more UV lights which irradiate the air flow, therebyremoving airborne contaminants such as viruses, superbugs, mold, etc.

In some embodiments of the inventions, an air circulation device maycomprise: a ceiling tile; at least a first fan mounted to the ceilingtile; a first vent in the ceiling tile; and a baffle, mounted to theceiling tile, and defining at least a first airway between the fan andthe first vent. A first LED strip may be mounted to the ceiling tile.Further embodiments may comprise at least a second vent, and a secondLED strip, and wherein the baffle further defines a second airwaybetween the fan and the second vent. The air circulation may furthercomprise at least a second fan, wherein the first and second fan areconfigured in-line to direct air into the first and second airway. Insome embodiments, the first and second fan are configured as airin-takes and air is exhausted through the first and second vent, and thefirst and second fan are configured to rotate in opposite directions.

Further yet, embodiments may include an air diversion mechanismconfigured to divert air from the first and second fan to the first andsecond airway. A first UV light source may be mounted in the firstairway. In some embodiments, a second UV light source is mounted in thesecond airway. In some embodiments, the first and second airway arelined with a UV-reflective material. Moreover, the UV-reflectivematerial may be stainless steel. The first and second UV light sourcesmay emit UV-C light waves having a wavelength between 200 to 280nanometers. The first and second UV light sources may be configured tobe activated and deactivate via a remote control. The ceiling tile maybe a drywall structure. In other embodiments, the ceiling tile is anacoustic panel.

The inventions include an air purifying device, comprising: a ceilingtile having at least one vent; a fan mounted to the ceiling tile; abaffle defining at least a first airway between the fan and the vent;and at least a first UV light source mounted in the first airway,wherein the first airway accommodates a UV-reflective material in atleast a portion of the first airway; and wherein a first UV-screen isattached to the first airway to block UV light from exiting the airway.

In some embodiments, the air purifying device comprises at least asecond vent, and wherein the baffle further defines at least a secondairway between the fan and the second vent, wherein a second UV lightsource is mounted in the second airway, wherein the second airwayaccommodates a UV-reflective material in at least a portion of thesecond airway, and wherein a second UV-screen is attached to the firstairway to block UV light from exiting the airway.

Further yet, in some embodiments the UV-reflective material creates akill zone which decontaminates air flowing through the first and secondairway. In some embodiments, a second fan mounted to the ceiling tileand in-line with the first fan. Some embodiments include an airdiversion mechanism configured to divert air into the first and secondairway. The first and second fan can be configured to rotate in oppositedirections. The UV light source may be activated and de-activateremotely to decontaminate airflow through the first and second airway.In some embodiments, the UV light source is a UV-C light source having awavelength between 200 to 280 nanometers.

The present invention further addresses the need to contain the lightemitted from a UV-C light source within the chamber to create the killzone. An extensive system of barriers are utilized within the killchamber to create a kill zone while precluding the UV-C light fromexiting the kill chamber. The baffles may be coated with a reflectivematerial to enhance the effectiveness of UV-C light within the killchamber.

The present invention combines the benefit of savings in electricalenergy with savings in HVAC energy costs in one unit.

The present invention further includes the benefit of adapting the fanand LED lighting fixture to fit into the foot print of a ceiling tile topermit installation of the fixture in standard ceiling tileconfigurations, thus maintaining the aesthetics of the ceiling.

The present invention also includes the benefit of utilizing an ethernetor Wi-Fi (wireless) connection for remote control of the lighter andfan.

The present invention includes the benefit of moving air in an indoorspace to provide more efficient heating of the indoor space.

The present invention may include the stepped fan blade technology ofU.S. patent application Ser. Nos. 14/814,161, 15/043,923 and 15/346,913which are all incorporated herein by references in their entirety. Thestepped-fan blade technology provides the benefit of moving air throughthe fixture in a more efficient manner, thereby reducing the amount ofenergy required to operate the unit. The stepped blade technology alsoenables the fan to operate at a lower speed thus utilizing less energyand reducing noise. Finally, the stepped-fan blade technology dispersesthe air in a uniform manner.

The present invention provides the additional benefit of enhancing thelife of all of the electrical fixtures (both the lighting and fanfixture) by reducing the amount of deterioration on each fixture causedby heat.

The present invention will also enhance the foot-candles per wattperformance of the lighting optics by reducing the temperature of theLED light. The present invention reduces the problem of the LED lightdegrading over time due to an increase in temperature.

This design of the present invention will also enhance the ability toself-clean the lens on the LED face by utilizing air to push any dust ordebris away from the lighting fixture.

This design of the present invention provides for a competitiveadvantage in that it permits electrical hook up in one complete unitthat used to require two separate electrical connections, one for thefan and one for the light.

An added benefit of the present invention provides for a filter to cleanthe air that comes through the perforations of the intake or the screenof the light fixture—therefore creating a cleaner air environment.

The present invention may include the added benefit of connecting thelight fixture to an HVAC system which introduces cooled or heated airinto the fan of the light fixture to permit the cooled/heated air intothe light fixture.

The present invention may utilize various color schemes to impactvarious behavior traits of a person. Color is believed to profoundlyaffect the productivity of a person. Research has shown that blue coloris believed to affect a person's mind; yellow is believed to affect aperson's emotions; red is believed to affect a person's body; and greenis believed to affect a person's balance. Utilizing these colors in thepresent invention, the colors can affect a person's behavior. The colorsscheme may be incorporated into the lens, the troffer shelf or the LEDlight.

Finally, the present invention presents a benefit of elimination of anystrobing effect caused by the fan blades interfering with the lightdistribution.

These and other objects and advantages of the present invention, as wellas the details of the illustrative embodiment, will be more fullyunderstood from the following specification and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional view of one embodiment of the combination lightand fan fixture depicting a troffer shelf;

FIG. 2 is a sectional view of one embodiment of the combination lightand fan fixture showing the flow of air;

FIG. 3 is a prospective view of one embodiment of the combination lightand fan fixture depicting a troffer shelf;

FIG. 4 is a sectional view of one embodiment of the combination lightand fan fixture of another embodiment depicting an alternativeembodiment of a troffer shelf;

FIG. 5 is a sectional view of one embodiment of the combination lightand fan fixture depicting an angled shell showing the flow of air;

FIG. 6 is a sectional view of an alternative embodiment of thecombination light and fan fixture depicting another embodiment of theangled deflection mechanism;

FIG. 7 is a sectional view of yet another alternative embodiment of thecombination light and fan fixture with the LED lighting fixturepositioned in an indirect lighting configuration.

FIG. 8 is a perspective view of the embodiment shown in FIG. 7;

FIG. 9 is a perspective view of an embodiment of the present inventionutilizing multiple round grills;

FIG. 9A is a perspective view of the fan grate depicted in FIG. 9;

FIG. 10 is a perspective view of an embodiment of the present inventionutilizing a single grill and lens;

FIG. 10A is a perspective view of the fan grate depicted in FIG. 10;

FIG. 11 is a view of the present invention incorporating multiple fanblades;

FIG. 11A is a view of the present invention incorporating multiple fanblades;

FIG. 12 is a perspective view of an axial fan of the present invention;

FIG. 13 is a bottom view of one embodiment of the combination light andfan fixture;

FIG. 14 is a bottom view of an alternative combination light and fanfixture having 4 LED lights;

FIG. 15 is a bottom view of a ceiling tile having intake fans, exhaustvents, and LED lighting;

FIG. 16A is a cross section of a ceiling tile having a fan which directsair into a first and second airway;

FIG. 16B is a cross section of a ceiling tile having a UV light sourcefor irradiating air flow through an airway;

FIG. 17 is an exploded view of components of a ceiling tile having twofans, two LED lighting strips, and an upper baffle for defining airways.

FIG. 18 is a bottom view of a ceiling tile having intake fans, exhaustvents utilizing a UV light source for irradiating air flowing throughthe chambers;

FIG. 19 is a perspective view of a ceiling tile having intake fans,exhaust vents utilizing a UV light source for irradiating air flowingthrough the chambers;

FIG. 20(a) is a cross section of a ceiling tile having a UV light sourcefor irradiating air flow through a chamber, a raw intake, exhaust ventsand various baffles; and

FIG. 20(b) is a cross section of a ceiling tile having a UV light sourcefor irradiating air flow through a chamber, a raw intake, exhaust ventsand baffles with a reflective material.

DETAILED DESCRIPTION OF THE INVENTION

Embodiments of the present invention may comprise a combination of a fanand LED light fixture. FIGS. 1 and 2 show side sectional views of anembodiment of the present invention depicting a troffer shelf 12. FIG. 3shows a perspective view of an embodiment having a troffer shelf. Thecombination fan 10 may include a troffer shelf 12 which supports atleast one LED light fixture 20 and a fan 30. The fan 30 is supported bya louvered fan support 18. As shown in FIG. 3, the louvered fan support18 has a lower solid portion 19 and an upper open portion 17 thatincludes several opening and louvers 60 which direct air from the fanchamber 13 along the troffer shelf 12. It is not material to the presentinvention where the solid portion 19 and open portion 17 is located inthe fan support 18. What is important is that there is a solid portion19 of the fan support 18 that braces the fan 30, and an open portion 17that is configured to permit air to flow from the fan chamber 13 to thetroffer chamber 16. The direction of the air flow is not necessarilyimportant to the present invention. What is important is that the fan 30causes air to flow in the vicinity of an LED light fixture 20.

The troffer shelf 12 may have the same general dimensions as a ceilingtile typically 1 ft.×2 ft., 2 ft.×2 ft. or 2 ft.×4 ft. The LED lightfixture 20 is typically positioned along the troffer chamber 16 alongthe troffer shelf 12 such that light from the fixture 20 is notinterrupted by the fan 30. The LED light fixture may include an LED lamp22. The LED light fixture 20 is preferably in the form of a strip whichruns the length of the troffer shelf 12. The LED light fixture 20 issecured to the troffer shelf 12 in such a manner to permit air to flowalong a substantial portion of the surface area of the LED lamp 22 andlight fixture 20. The LED light fixture 20 may include a magneticattachment mechanism to secure the light fixture 20 to the troffer shelf12. The magnetic attachment mechanism serves multiple purposes includingthe ability to detach the LED light fixture 20 from the troffer shelf 12in a relatively easy fashion. The magnetic attachment mechanism furtherserves to provide a space between the LED light fixture 20 and troffershelf 12 for air to flow through which increases the surface area of theLED light fixture 20 that contacts the air. The greater the surface areaof the LED light fixture 20 that comes in contact with the air flow, thefaster and more efficient the temperature reduction of the LED lightfixture. While LED light fixtures are discussed throughout thisdisclosure, it is understood that other types of lights may be utilizedin the invention and benefit from the features of the invention.

The fan 30 preferably includes at least an axial fan as shown in FIG.12. Referring back to FIGS. 1, 2 and 3, there may be more than one fanwithin the fan area 13. The blades 32 of the fan 30 force air to moveparallel to a shaft 34 about which the blades 32 rotate. Air flow 40moves axially through the intake of the fan 36 and axially out throughthe outlet 38 of the fan 30. The flow of air is generally linear troughthe intake 36 and the outlet 38. The design of the fan 30 is a functionof the blade configuration 32 that creates a pressure of differentialthat produces airflow 40 across the fan blade 32. The fan 30 may consistof anywhere from 2 to 8 blades. The fan 30 is connected to a motor 51and typically operates at high speeds. The typical speed of the axialfan of the present invention operates between 1800 to 4000 RPM toproduce airflow in the range of 85 to 150 cubic feet per minute. Whilean axial fan is disclosed in the figures of the invention, it isunderstood that other types of fans such as a bladeless fan, cross-flowfan, or impeller-type fan may be used as the fan 30 in the embodimentsshown in the figures. Any of those types of fans can be utilized withouthaving a detrimental effect on the function and features of theinvention. The important feature of the fan 30 is to move anddistributes air within the fan area, regardless of the type of fan thatwas used.

As shown in FIG. 2, the configuration of the troffer shelf 12 directsthe flow of air from the outlet 38 of the fan 30. Air flows along thetroffer shelf 12 and the troffer baffle 14, along the LED light fixture20. Air passing along the LED light fixture 20 acts to dissipate heatproduced by the LED light fixture 20 which reduces the operatingtemperature of the LED light fixture 20. In essence, the air flowreduces waste heat produced by the LED fixture 20 by conducting the heataway from the fixture 20. It is believed that the airflow in the currentinvention can reduce the temperature of the LED light fixture fromapproximately 120° F. to approximately 80° F. in the typical environmentfound in offices, hospitals, retail stores, educational institutions andthe like.

FIGS. 1, 2 and 3 depict a combination LED light fixture and fan 10. Theair exiting the outlet 38 of the fan 30 is propelled into the fanchamber 13. The air in the fan chamber 13 as shown in FIG. 3, isdirected by a diversion mechanism 50 so that the air flows throughopenings 17 in the fan support 18. The air flowing through the opening17 is directed by louvres 60 into the light chamber 16, along thetroffer shelf 12, to engage the LED light fixture 20. By directing airfrom the fan 20 along the troffer shelf 12 causes the air to circulatearound the LED light fixture 20 to reduce the temperature of the lightfixture 20. The air flow in the lighting chamber 16 is directed by thetroffer baffle 14 through an exit vent 84 formed by the damper 81.

In embodiments of the present invention, there may be a vent and lensbracket 80. The bracket 80 is affixed to the troffer shelf 12 in such amanner to permit air to flow from the light chamber 16 through an exitvent 84 formed by a damper 81 in the bracket 80. The vent 84 permits theair heated by LED light fixture 20 to exit the light chamber 16. Thebracket 80 also includes a lens bracket 82. The lens bracket 82corresponds with a fan lens bracket 83 to secure a lens 90 in placewithin the combination LED light and fan 10. The lens 90 provides asolid surface to assist with containing any air from the fan 30 suchthat it proceeds along the troffer shelf 12 and the troffer baffle 14 tothe LED light fixture 20 and through the vent 84. A lens 90 is notnecessary to the invention. However, the lens 90 typically made of asomewhat flexible translucent plastic material. There is a mountingmechanism 100 that is used to affix the combination LED light fixtureand fan to an adjacent ceiling tile or bracket.

Some embodiments of the present invention may incorporate the use ofcolor displayed by the lighting system to affect the environment inwhich the combination LED light and fan fixture 10 may be implemented.Research has shown that different colors appear to affect behavioraltraits in humans. For example, the color yellow is believed to influencea person's self-confidence; the color red is believed to influence aperson's physical body, the color blue is believed to influence aperson's mind and the color green is believed to influence a person'semotional balance. It is believed that, for example, the combination ofa yellow color with a blue color will stimulate a person's emotionalbalance and mind. The different color combinations may be incorporatedinto the present invention in numerous ways. In one embodiment of thepresent invention, the colors blue, red, yellow or green may be appliedto the internal surface of the troffer shelf 12 and/or the trofferbaffle 14 by means of paint, insert or other known technique.Alternatively, the lens 90 may comprise of the colors blue, red, yellowor green. The colored lens 90 operates to transmit light of the lenscolor in an indoor space. Finally, the LED light fixture 20 itself maybe configured to generate light in the blue, red, yellow or greenspectrums by means of the LED lamp 22.

The air exiting from the fan cavity 16 is directed along an airflowsurface on the troffer shelf 12 and troffer baffles 14 air mayalternatively be directed through a cooling chamber, which is not shownbut functions to cool the fan components, as well as, the LED lightingcomponents. The internal surface of the troffer shelf 12 and trofferbaffles 14 may be coated with a Miro-Micro Matt wet paint produced byAlanod. The paint helps to maintain airflow along the surface, as wellas, maintain a clean dust-free surface. The airflow 40 has two generalcomponents. The air that exits the fan cavity 13 generally has a laminarflow along the airflow surface of the troffer shelf 12. As the flow ofair from the fan 30 extends towards the exterior perimeter of thetroffer shelf 12 and troffer baffles 14 through the vent 84, the flowbecomes more turbulent and mixes with the surrounding air. The preferreddirection of the air-flow is such that the intake 36 of the fan 30 drawsair from the lower portion of a space and distributes the air along theupper portion of the space. Air along the lower portion of an area tendsto be cooler than air that resides at the upper portion of an area. Thecooler air is pulled into the fan 30 and distributed from the cavity isused to cool and clean the LED light fixture 20, and/or the LED lightbulb 22.

The combination fan of the present invention may utilize the stepped-fanblade design depicted in the pending patent application Ser. No.14/814,161, 15/043,923 and 15/346,913, each of which is herebyincorporated by reference, in the entirety. The benefits of thestepped-blade design are set-forth in detail in the pending patentapplications referenced herein and need not be repeated in thisprovisional application and are not shown in the drawings. Thestepped-fan blade design greatly improves the air flow characteristicsof the fan 30.

As shown in FIGS. 9, 9A, 10 and 10A, the fan intake 36 may includedecorative perforations and/or a grill 39. The grills 39 may be of acircular configuration as shown in FIGS. 9 and 9A. Alternatively, thegrill may extend the length of the fan intake 36 as shown in FIGS. 10and 10A. The air intake 36 may also include a filter (not shown).Alternatively, the filter may be positioned at the air outlet 38 or at agrill covering the combination fan 39. The filter serves to clean airflowing through the fan of dust and other fine particles. The filtersmay be removed for cleaning or replacement on a periodic basis. Theembodiments shown in FIGS. 10 and 10A are more adapted to accommodate afilter.

In some embodiments of the inventions, the combination fan and LED lightsystem further includes an air diversion mechanism 50. The air diversionmechanism 50 is positioned within the cavity of the fan chamber 13. Thephysical configuration of the air diversion mechanism 50 is such that itdirects air exiting the fan outlet 38 through the louvered openings 17or diffuser in the louvered fan holder 18. In some embodiments, the airdiversion mechanism 50 is in the shape of a prism as shown in FIGS. 1through 7. Alternatively, the air diversion mechanism 50 may be in theshape of a pyramid (FIG. 8), cone, pentagon, triangle or other suitableshape to divert air from the fan chamber 13, through the openings 17 andinto the troffer chamber 16 along the LED light fixture 20. The airdiversion mechanism directs air towards opening 17 along louvered vents60 positioned along the inside fan chamber 13. The vents 17 may includelouvres 60 to assist in directing the air in the desired direction.Positioned within the air diversion mechanism 50 is a ballast housing 51for LED lighting ballast, drivers and wires. The ballast housing 51houses the wiring for both the LED lighting system and the fan to allowfor a single hook-up to the electrical outlets or connections positionedwithin the ceiling.

The air exiting from the fan cavity 13 is directed along an airflowtroffer shelf 12 to the troffer baffle 14. Air may alternatively bedirected through a cooling chamber, which is not shown, but functions tocool the components located in the ballast housing 51, as well as, theLED lighting components.

As shown in FIG. 2, air 40 enters the fan 30 and is expelled by the fanblades 32 into the air chamber 13. Air flow in the fan chamber isgenerally laminar. Air is forced into the air chamber 13 and is directedby a louvre 60 through an opening in the fan chamber 13 into the lightchamber 16. The air (shown in arrows) has generally a laminar flow alongthe troffer shelf 12 and troffer baffle 14. As the flow of air from thefan 30 extends towards the exterior perimeter of the housing in the vent84, the flow becomes more turbulent and mixes with the surrounding airsuch that the air exiting through the damper 81 is more turbulent innature. The preferred direction of the air-flow is such that the intake36 of the fan 30 draws air from the lower portion of a space anddistributes the air along the upper portion of the space. Air along thelower portion of an area tends to be cooler than air that resides at theupper portion of an area. The cooler air is pulled into the fan 30 anddistributed from the cavity is used to cool and clean the LED lightfixture 20, the LED cover 24 and/or the LED light bulb 22. In analternative embodiment, the direction of the airflow may be reversed.

Turning to FIGS. 4, 5, 6 and 7, refer to alternative embodiments to theembodiment of FIGS. 1, 2 and 3. An alternative embodiment comprises acombination of a fan and LED light fixture. FIGS. 4, 5, 6 and 7 showviews of different embodiments of the present invention.

FIG. 4 depicts an alternative design of the troffer shelf and thetroffer baffle 14. In the alternative design, air is propelled from thefan 30 into the fan chamber 13. The air from the fan 30 is deflected bya diversion mechanism 50, through the opening 17 and directed by louvres60 into the light chamber 16. The louvres 60 are configured to directthe air from the fan along the troffer shelf 12 and along the trofferbaffles 14. By directing air from the fan 30 along the troffer shelf 12causes the air to circulate along LED light fixtures 20. The air flowhelps to reduce the temperature of the LED light fixture 20. The airflow is directed by the troffer baffle 14 through an exit vent 84 formedby the damper 81, in the lens bracket 80.

In FIG. 4, the troffer shelf 12 has more of a squared-shape. The troffershelf 12 and the troffer baffle 14 intersect at generally right anglesto each other. The fan 30 is positioned in generally the same positionas demonstrated in FIG. 3. The fan chamber 13 includes a diverter 50 todirect air exiting the fan 30 through the open portion 17 of the fanchamber 13. Louvers 60 direct the air passing through the open portion17 of the fan chamber 30 into the light chamber 16. Air flows along thetroffer shelf 12 and the troffer baffle 14 passed the LED light fixture20. Air passing along the light fixture passes along the plurality ofLED light fixture 20 to dissipate the heat in the LED light fixture 20.The air follows a path along the air baffle through the vent 84 out ofthe light chamber 16.

The bracket 80 includes a damper 81 and lens bracket 82. The embodimentincludes a lens 90 which acts to diffuse the light emitted from the LEDlights 20. There is a mounting mechanism 100 used to affix thecombination LED light fixture and fan to an adjacent ceiling tile orbracket.

The interior surface of the troffer shelf 12 and troffer baffle 114 maybe coated with a Miro-Micro Matt wet paint produced by Alanod. The painthelps to maintain airflow along the surface, as well as, maintain aclean dust-free surface. The paint can be applied in any of the colorsdiscussed above to affect the environment.

As shown in FIGS. 5 and 6, the combination fan 110 includes a housing112 which supports at least one LED light fixture 120 and a fan 130. Thehousing is the same dimensions as a ceiling tile typically 2 ft.×2 ft.or 2 ft.×4 ft. The LED light fixture 120 is preferably positioned alongthe periphery of the housing 112 such that light from the fixture 120 isnot interrupted by the fan 130. The LED light fixture includes an LEDlight bulb 122.

The alternative embodiments of the combination LED light fixture and fan110 utilize an internal baffle 114. The internal baffle 114 serves todirect air within the troffer cavity 116 and provide support for the LEDlighting 120. The embodiments depicted in FIGS. 5 and 6 include a fan130 that directs air through a fan exit 138 in the fan chamber 113. Thefan chamber 113 includes an air diverter 150 which may take on manydifferent shapes, such as a prism shown in FIG. 5 or a trapezoidal shapeshown in FIG. 6. Air from the fan chamber 113 is directed by thediverter 150 through the open portion 117 of the fan support 118. Theair flowing through the open portion 117 of the fan support 118 isdirected by louvres 160. As shown in FIG. 6, the air is directed by thelouvres 160 into the baffle chamber 116 along the baffle 114 across theLED light 120. The air passing across the LED light 120 is directed bythe baffle 114 through the exit vent 184.

In FIG. 5, the baffle 114 guides air flowing through the openings 117 inthe fan chamber 113 (which is directed by the baffles) along the LEDlight fixture 120. The air serves to reduce the temperature of the LEDlight fixture 120 and extend the life of the fixture 120. The baffle 114guides the air flow from the LED light fixture 120 through the exit vent184.

The fan 130 preferably includes an axial fan. The blades 132 of theaxial fan force air to move parallel to a shaft 134 about which theblades 132 rotate. The flow of air 140 is axially through the intake ofthe fan 136 and axially out through the outlet 138 of the fan 130. Theflow of air is linear trough the intake 136 and the outlet 138. Thedesign of the fan 130 is a function of the blade configuration 132 thatcreates a pressure of differential that produces airflow 140 across thefan blade 132. The axial fan 130 may consist of anywhere from 2 to 8blades. The axial fan 130 is connected to an energy source (not shown)and typically operates at high speeds. The typical speed of the axialfan of the present invention operates between 1800 to 4000 RPM toproduce airflow in the range of 85 to 150 cubic feet per minute. Thecombination fan of the present invention may utilize the stepped-fanblade design depicted in the pending patent applications referencedabove.

The fan intake 136 of FIGS. 5 and 6 may include decorative perforationsand/or a grill as shown in FIGS. 9 and 10. The air intake 136 may alsoinclude a filter (not shown). Alternatively, the filter may bepositioned at the air outlet 138 or at a screen covering the combinationfan 142. The filter serves to clean air flowing through the fan of dustand other fine particles.

One embodiment of the combination fan and LED light system 110 furtherincludes an air diversion mechanism 150. The air diversion mechanism 150is positioned within the fan chamber 113 of the fan 130. Looking at FIG.14, the air diversion mechanism 150 is in the shape of a prism as shownin FIGS. 5, 6 and 13. Alternatively, the air diversion mechanism 150 maybe in the shape of a pyramid (FIG. 14), cone, pentagon, triangle orother suitable shape to divert air to the LED components and into theoffice space. The air diversion mechanism 150 directs air towards vents117 positioned along the fan cavity 113. The vents 117 may includelouvres 160 to assist in directing the air in the desired direction.Additionally, the air diversion mechanism may have vents to permit aportion of the air circulated by the fan to enter the diversionmechanism 150 to provide a cooling effect on the ballast housing 151.

The air exiting from the fan cavity 116 is directed along an airflowsurface on the troffer baffle 114 air may alternatively be directedthrough a cooling chamber, which is not shown but functions to cool thefan components, as well as, the LED lighting components. The internalsurface of the troffer baffle 114 is preferably coated with a Miro-MicroMatt wet paint produced by Alanod. The paint helps to maintain airflowalong the surface, as well as, maintain a clean dust-free surface. Theairflow 140 has two general components. The air that exits the fancavity 113 generally has a laminar flow along the airflow surface of thelower housing portion 114. As the flow of air from the fan 130 extendstowards the exterior perimeter of the housing 112 through the vent 184,the flow becomes more turbulent and mixes with the surrounding air. Thepreferred direction of the air-flow is such that the intake 136 of thefan 130 draws air from the lower portion of a space and distributes theair along the upper portion of the space. Air along the lower portion ofan area tends to be cooler than air that resides at the upper portion ofan area. The cooler air is pulled into the fan 130 and distributed fromthe cavity is used to cool and clean the LED light fixture 120, and/orthe LED light bulb 122.

An embodiment of the combination LED light fixture and fan 200 in whichthe LED light fixtures 220 are directed toward the ceiling is depictedin FIGS. 7 and 8. The combination LED light fixture and fan 200 in FIG.7 includes a fan 220. The fan 230 may include an invented axial fan, orany fan that serves the purpose of distributing air in a relativelyquiet fashion. The fan 230 includes an air inlet 236 and air exit 238.There is a fan chamber 216. Air is drawn from the indoor environment,through the air inlet 236 and propelled by the fan through the fan exit238 into the fan chamber 213. There is a diverter 250 positioned withinthe fan chamber 213 to direct air from the fan through an open portion117 of the fan support 218. The open portion 217 may include louvers 260to guide the air from the fan chamber 213 into a troffer cavity 216.

The combination LED light fixture and fan 210 has a domed shell 292.While a domed-shaped shell 292 is shown in some embodiments, any shapedshell may be utilized and still practice the invention. The shell 292serves as a troffer. The shell 292 is configured to direct air from thetroffer cavity 216 along the LED light fixtures 220 and through the exitvent 284. A lens 290 is positioned on top of the shell 292. The LEDlight fixtures 220 may be configured to direct light upward toward theceiling or downward toward the shell 292. The shell 292 may be made of asolid material or alternatively a translucent material to permit lightto penetrate the shell 292 into the room. The combination LED lightfixture and fan 220 is supported from the ceiling by one or moremounting cables 294. The mounting cables 294 may be configured toaccommodate power cables to supply power to the fan 230 and LED lightfixtures 220.

The combination LED light fixture and fan as shown in all theembodiments of the present invention may use a hard-wired controlmechanism to control both the light 20 and fan 30. The invention may usean ethernet connection and remote control to activate the fan 30 and LEDlight fixture 20. Alternatively, a wi-fi (wireless) connection may beused in connection with a remote control to control the LED light 20 andfan 30. The remote control feature is configured to adjust the intensity(or color) of the LED light fixture 20 and the speed of the fan 30.

The embodiments of the inventions shown in FIGS. 1 through 7 show a fanthat is independent from the HVAC system of the building in which thecombination LED lighting fixture and fan 10 may be installed. However,it is contemplated that the combination LED lighting fixture and fan 10may be combined with the existing HVAC system in order to distribute theair from the HVAC system through fan chamber 13 and through the lightchamber 16. The combination LED lighting fixture and fan 10 may be theprimary source of distribution of the air from the HVAC system or itcould be use in a supplemental capacity. If the HVAC system isimplemented in connection with the combination LED light fixture and fan20, the HVAC system could be connected to the combination LED lightfixture and fan 10 at several locations. For example, the HVAC systemcould be configured to delivery air from the HVAC system into the fanchamber 13 or the light chamber 16 by connecting a duct from the HVACsystem to either the fan chamber 13 or the troffer cavity. The fan 30 ofcombination LED light fixture and fan 10 provides a supplemental airdelivery system to augment the HVAC system.

As shown in FIGS. 11 and 11A, the combination fan may include two ormore fans 30. In the multiple fan configuration, it is beneficial thatadjacent fans rotate in different directions to provide a more evendistribution of air along the fan 30. It is important to note that theadjacent fans rotate in opposite directions. As shown in FIG. 11A, themultiple fans may all rotate in the same direction.

FIG. 12 depicts a fan 30 and 130 that may be used in embodiments of theinventions.

Various aspects of this disclosure may include components which areimplemented directly into a ceiling grid, or ceiling tile, as seen forexample in FIG. 15. It is contemplated that an exemplary ceiling tile1501 may be sized as 1′×4′; 2′×2′; or 2′×4′, although a person of skillin the art would understand that any appropriately sized ceiling tilemay be used in accordance with the present inventions. Moreover, ceilingtile 1501 could be acoustical, fiber, wood, metal, translucent, plastic,sheet rock, or drywall structures as are known to be used in industrial,commercial, or residential environments.

In embodiments of the inventions, ceiling tile 1501 may have one or morefans 1502 and vents 1503 cut into the ceiling tile 1501, sometimesreferred to herein as a ceiling panel. Panel cuts may be made ormanufactured using waterjet cutting, die cutting, laser cutting, CNCrouting, CNC knife cutting, reciprocated knife cutting, or any otherknown techniques for cutting through tiles. Vents 1503 may take the formof elongated slot(s) extending near the edge of ceiling tile 1501,although other shapes are also contemplated. For example, FIG. 15 showstwo elongated vents on the ceiling tile 1501's top edge, and twoadditional vents along the bottom edge. A person of skill in the artwould understand that additional arrangements are contemplated. OptionalLED strips 1504 may be included and may extend between the one or morefans 1502 and vents 1503.

As seen in FIG. 16A, which is a cut-away side view of embodiments of theinventions, an upper baffle 1610 and one or more lower baffles 1620,1621, may act together to define one or more airway(s). For example, airmay pass from a fan 1502, along airway(s) 1630, 1631 (e.g. a firstairway to the left and a second airway to the right), to vents 1503.Upper baffle 1610 may comprise an apex portion 1615 which is formed inclose proximity to fan(s) 1502 and/or 1503. Embodiments in which an apexportion 1615 extends into proximity with fan(s) 1502 and/or 1503 providethe advantage of improved airflow: that is because apex portion 1615forces air to split evenly towards the left and right side. In theabsence of apex portion 1615, the direction of rotation of fan(s) 1502and/or 1503 may lead to uneven air distribution. The apex portion 1615performs a similar function to air diversion mechanism 50 describedabove. Indeed, a person of skill in the art would recognize that the airdiversion mechanism 50 (See e.g. FIG. 1) may be included in theembodiment of FIG. 16. Preferably, fan(s) 1502 take in air, which isreleased out through vents 1503. In such an arrangement, fan(s) 1502 actas an air intake and vents 1503 act as an exhaust. A person of skill inthe art would recognize that it is also possible for fan(s) 1502 and/or1503 to be configured to act as an exhaust, rather than an intake. Inembodiments where LED strips are included, the flow of air throughairways 1630 and 1631 may act to cool the LED strips 1504. Where two ormore fans 1502 are included in an embodiment, it may be desirable, asalready described above, to have them rotate in opposite directionsrelative to one another, e.g. one may spin clockwise while the otherspins counterclockwise.

Embodiments of the invention further include the functionality ofirradiating germs out of the air using UV light. Such embodimentsprovide the advantage of not only circulating air in an environment, butalso killing viral, bacterial, and fungal species which may be living inthe environment's air. It is known the UV light degrades organicmaterials, but inorganic materials (including metals or glass) are notaffected by UV light. Therefore, UV light is effective for reducingorganic matter which may be airborne in the air. Reducing airbornecontaminants may be important in any environment, but especially inhospitals or schools, which may be particularly susceptible to disease.Regardless of the environment, disinfecting the air of contaminants ishelpful to reduce the spread of disease.

It is preferable to reduce or eliminate contact with UV lighting becauseUV light can be harmful to humans and/or animals (particularly overprolonged durations). Embodiments of the invention therefore provide theadvantage of positioning a UV light source in the ceiling tile, wherethe UV rays may be contained in the ceiling tiles. For example, FIG. 16Billustrates exemplary UV light source(s) 1640 which are mounted insidethe upper baffle 1610 and thus irradiate organic matter residing in airas air flows from the fan to the vent. A person of skill in the artwould recognize that UV light sources include a power source and mayoptionally include an on/off controller (not shown). The UV light sourcemay be activated by an on/off button, or it may be controlled by theremote control feature described further herein. In such an embodiment,a remote control may include the ability to activate or de-activate a UVlight source.

In some embodiments, light source(s) 1640 may emit UVC light, which hasa wavelength of approximately 200 to 280 nanometers. A person of skillin the art would recognize the UVC light is optimal for irradiatingairborne contaminants (such as viruses, superbugs, mold, and the like)in most environments. In embodiments of the invention, the upper baffle1610 and/or the lower baffle 1620/1621 may be made of, or coated with, aUV-reflective material. A person of skill in the art would recognizethat a UV-reflective material could include a metal, such as stainlesssteel, or a specialty coating. Lining the airway with a reflectivematerial and/or reflective coating provides the advantage of creating a“kill chamber,” or “kill zone” inside the airways 1630, 1631, where UVrays may bounce to increase their exposure to air passing through theairways 1630, 1631, and by extension, increase the irradiation oforganic matter contained in the air.

Furthermore, some embodiments of the inventions may include a UV-screenin the form of flange 1650 which is attached to the end of airways 1630and/or 1631 to shield UV rays from exiting the airways and entering anenvironment (such as a room or commercial space). In this way, includingUV-screen(s) 1650 at the end of an airway Although FIG. 16B illustratesa UV source in an embodiment which is built into a ceiling tile, itshould be understood that the disclosed UV source and “kill chamber” maybe implemented in any of the embodiments disclosed herein.

FIG. 17 shows an exploded view of components of the invention. Forexample, the embodiment of FIG. 17 shows a ceiling tile 1501 in whichthere are cut-outs for fans 1502 and vents 1503. Upper baffle 1610 isshown, sized to fit onto ceiling tile 1501. Furthermore, FIG. 17 showsexemplary LED strips 1504 (including power cord) which may be mounted onthe ceiling tile 1501's underside.

Various aspects of this disclosure may include components which areimplemented directly into the ceiling grid, or ceiling tile 1801, asseen for example in FIG. 18. It is contemplated that an exemplaryceiling tile 1801 may be sized as 1′×4′; 2′×2′ or 2′×4′, although aperson skilled in the art would understand that any appropriately sizedceiling tile may be used in accordance with the present inventions.Moreover, ceiling tile 1801 could be acoustical, fiber, wood, metal,translucent, plastic, sheet rock, or drywall structures as are known tobe used in industrial, commercial, or residential environments.Alternatively, the ceiling grid 1801 may take the form of a lightfixture that fits within the ceiling tile grid.

In embodiments of the inventions, ceiling tile 1801 may have one or morefans 1802 and vents 1803 cut into the ceiling tile 1801, or positionedin the ceiling grid, sometimes referred to herein as a ceiling panel.Panel cuts may be made or manufactured using waterjet cutting, diecutting, laser cutting, CNC routing, CNC knife cutting, reciprocatedknife cutting, or any other known techniques for cutting through tiles.Vents 1803 may take the form of elongated slot(s) extending along theedge of ceiling tile 1801, although other shapes are also contemplated.For example, FIG. 18 shows an elongated slot 1803 that runs along theentire length of the tile 1801. A person of skill in the art wouldunderstand that additional arrangements are contemplated. Optional LEDstrips (not shown) may be included, and may extend between the one ormore fans 1802 and vents 1803.

As seen in FIG. 20A, which is a cut-away side view of embodiments of theinventions, upper baffles 2010, 2011 and one or more lower baffles 2020,2021, may act together to define one or more airway(s). For example, airmay pass from a fan 2002, along airway(s) 2030, 2031 (e.g. a firstairway to the left and a second airway to the right), to vents 2003.Upper baffles 2010, 2011 may form air deflection mechanism 2015 which isformed in close proximity to fan 2002. Alternatively, the deflectionmechanism 2015 may consist of a separate structure. Embodiments in whichan air diversion mechanism 2015 extends into proximity with fan 2002provides the advantage of improved airflow: that is because the airdiversion mechanism 2015 forces air to split evenly towards the airchambers 2030 and 2031. In the absence of air diversion mechanism 2015,the direction of rotation of fan 2002 may lead to uneven airdistribution. The air diversion mechanism 2015 performs a similarfunction to air diversion mechanism 50 described above. Indeed, a personof skill in the art would recognize that the air diversion mechanism 50(See e.g. FIG. 1) may be included in the embodiment of FIGS. 20A and20B. Also included within the air flow airways 2030 and 2031 are aseries of baffles 2040, 2042 and 2044. The baffles operate to direct theair flowing through the airways 2030 and directs the air through anoutlet vent 2003. The baffles 2040, 2042 and 2044 form what is calledthe kill zone. There may be included in the embodiment shown in FIG. 20Aare UV light systems 2060. The UV lights 2060 operate to irradiatefungi, bacteria and viruses form the air circulating through the system2001. The UV lights operate within a wavelength of approximately 200 to280 nanometers. The bulbs used in the UV light are typically referred tothe UV-C light spectrum. The UV-C bulbs operate along the specific wavelength of ultra-violet lights or light diffusing optical fibers. TheUV-C light sources are typically referred to as T-5, T-8 or similarlytype of LED lighting fixtures. The embodiment in FIGS. 20A and 20B mayinclude an indicator light (not shown) to indicate when the UV-C lightsource is operating within the chambers 2030 and 2031. While the UV-Clight source is shown in FIGS. 20A and 20B the LED light 20 depicted inFIGS. 1-7, 13 and 14 above could be replaced with the UV-C light source.

The UV-C lights 2060, emitting light along a wavelength of 200 to 280nanometers, have been deemed to have potentially harmful effects onhumans. The baffles 2040, 2042 and 2044 operate to maintain the lightemitted by the UV-C light fixture 2060 within the fixture so thatlittle, if any, UV-C light is emitted from the fixture through the fans2002 or the vent 2003. The baffles 2040, 2042 and 2044 may be positionedon the opposite side of the airway 2031. Preferably, fan(s) 2002 take inair, which is released out through vents 2003. In such an arrangement,fan(s) 2002 act as an air intake and vents 2003 act as an exhaust. Aperson of skill in the art would recognize that it is also possible forfan(s) 2002 and/or 2003 to be configured to act as an exhaust, ratherthan an intake. In embodiments where UV-C lighting is included, the flowof air through airways 2030 and 2031 may act to irradiate the air toeliminate germs, viruses, bacteria, fungi or the like. Where two or morefans 2002 are included in an embodiment, it may be desirable, as alreadydescribed above, to have them rotate in opposite directions relative toone another, e.g. one may spin clockwise while the other spinscounterclockwise.

In the embodiment shown in FIG. 20B, the light source(s) 2060 may emitUVC light, which has a wavelength of approximately 200 to 280nanometers. A person of skill in the art would recognize the UVC lightis optimal for irradiating airborne contaminants (such as viruses,superbugs, mold, bacteria, fungus and the like) in most environments. Inembodiments of the invention, the upper baffle 2010 and/or the lowerbaffle 2020 and 2021 may be made of, or coated with, a UV-reflectivematerial. A person of skill in the art would recognize that aUV-reflective material could include a metal, such as stainless steel,or a specialty coating. Lining the airway with a reflective materialand/or reflective coating provides the advantage of creating a “killchamber,” or “kill zone” inside the airways 2030 and 2031, where UV raysmay be deflected within the kill chamber to increase their exposure toair passing through the airways 2030 and 2031, and by extension,increase the irradiation of organic matter contained in the air.Furthermore, in the embodiment of FIGS. 20A and 20B, the baffles 2040,2042 and 2044 located in airways 1630 and/or 1631 operate to (1) shieldUV rays from exiting the airways and entering an environment (such as aroom or commercial space) and (2) to increase the intensity the air isexposed to the UV-C light emitted by the UV-C light source 2060, and (3)increase the duration of air flowing through the airway 2030 and 2031 isexposed to the UV-C light. The baffles 2040, 2042 and 2044 operate toextend the time that the air flows along the kill zone thus increasingthe number of germs that are killed within the fixture. An actual testof a unit utilizing the UV-C light source 1640 was conducted. The studywas conducted to verify the unit's microbial reduction efficacy ofaerosolized contaminants. The unit was mounted on the ceiling in asealed 11′ 10″×11′ 10″×8′1″ (1125 cu·ft) controlled environment room.The unit's fan and UV lamps were powered on and allowed to warm up overthe course of 2-hours as part of conditioning. Aliquots of themicroorganisms were added to a pre-sterilized nebulizer reservoir. Thetesting room was sealed; all equipment activation was performedremotely. The nebulizer was powered to aerosolize the microbialsuspension. Following 5 minutes, the UV-C right source and fans werepowered on. Samples of the air were collected immediately after unitactivation using Bio-aerosol air impinger (Biosampler, SKC, Inc.). Theair sample were collected over the course of three minutes. Air sampleswere collected again following 1 and 2-hours following start. The systemwas deactivated, and the room was exhausted for 25 minutes before entryfor sample retrieval and subsequent analysis. The study was repeated asdescribed with only the fans running and then again with the unitcompletely powered off. All collected samples were analyzed intriplicate at the minimum as per standard lab operating procedures.Analysis was conducted as per laboratory's accredited ISO17025: 2005methodology: bacteria were analyzed as per SM 9215 (APHA 2012) and MS-2as per EPA 1602. Analysis was conducted using calibrated and/orvalidated Instruments to traceable standards (NIST). All QC was withinmethod acceptance limit. No general environmental conditions arespecified in the standard or have been identified that could affect thetest results or measurements.

The test results demonstrated the following:

The test resulted in a finding that 99.6% of K. pneumoniae waseliminated from the air after 1-hour of operation, and 99.998% of K.pneumoniae was eliminated from the air after 2-hours of operation. Therewas a 30% reduction of K. pneumoniae from the air after 1-hour ofoperation when the UV light source was not activated. The tests furtherfound that 98.4% of the MSZ virus was eliminated from the air after1-hour of operation and 99.6% of the MSZ virus was eliminated after2-hours of operation. There was a 27.2% reduction of MSZ virus from theair after 1-hour of operation when the UV light source was notactivated.

While specific combinations of elements are disclosed in specificembodiments, it should be understood that any combination of thedifferent features may be utilized in the combined fan.

The foregoing disclosure and description of the invention areillustrating and explanatory thereof, and various changes in the size,shape and materials as well as in the details of illustratedconstruction may be changed without departing from the spirit of theinvention.

It is understood that the invention is not limited to the specificembodiments disclosed and that modifications and other embodiments areintended to be included within the scope of the appended claims.Although specific terms are employed herein, they are used in a genericand descriptive sense only and not for purposes of limitation.

What is claimed is:
 1. An air purifying device, comprising: a ceilingtile having at least one vent and one fan portion; an upper coverattached to the ceiling tile defining at least an airway between the fanportion and the vent; a fan positioned in the fan portion adapted toguide air to the airway; a UV light source mounted in the airway,wherein the UV light source is a UV-C light source emitting light havinga wavelength between 200 and 280 nanometers; a first baffle positionedin the airway and a second baffle positioned in the airway, wherein thefirst baffle and second baffle are configured to direct air guided bythe fan to the airway along the UV light source; and wherein the firstbaffle and the second baffle are positioned in the first airway to actas a barrier preventing light emitted from the UV light source fromexiting the air purifying device.
 2. The air purifying device of claim1, wherein the first baffle accommodates a UV reflective material. 3.The air purifying of claim 2, wherein the second baffle accommodates aUV reflective material.
 4. The air purifying device of claim 1, whereinthe cover includes a UV reflective material.
 5. The air purifying deviceof claim 1, wherein the ceiling tile includes a UV reflective material.6. The air purifying device of claim 4, wherein the ceiling tileincludes a UV reflective material.
 7. The air purifying device of claim1, wherein the first baffle and second baffle create a kill zone whichkills bacteria, viruses or microbes present in the air guided by the fanto the airway.
 8. The air purifying device of claim 2, furthercomprising a second fan mounted to the fan portion of the ceiling tileand in-line with the first fan.
 9. The air purifying device of claim 8,wherein the first and second fan are configured to rotate in oppositedirections.
 10. The air purifying device of claim 1, further comprisingan LED light source affixed to the ceiling tile.
 11. The air purifyingdevice of claim 1, further comprising an actuator to control theoperation of the UV light source.
 12. The air purifying device of claim11, wherein the actuator is a remote control unit.
 13. The air purifyingdevice of claim 1, further comprising an indicator light sourceproviding a visual indication when the UV light source is operating. 14.An air purifying device comprising: a face-plate configured the size ofa ceiling tile, wherein the face-plate includes a fan portion and a ventportion; a cover attached to the face-plate forming an air chamberbetween the face-plate and the cover; a fan positioned in the fanportion of the face-plate, wherein said fan directs air through the airchamber to the vent portion; a UV-C light fixture positioned in the airchamber wherein the UV-C light fixture emits UV light to form a killzone within the air chamber; and a baffle positioned in proximity to thekill zone in the air chamber wherein the baffle is configured to directair to the kill zone and prohibit the UV light from exiting the killzone.
 15. The air purifying device of claim 14, further comprising a LEDlight positioned on the face-plate.
 16. The air purifying device ofclaim 14, wherein the UV-C light source emits UV-C light waves having awavelength between 200 and 280 nanometers.
 17. The air purifying deviceof claim 16, wherein the UV-C light source operates to kill at least 99%of K. pneumoniae from the air.
 18. The air purifying device of claim 14,further comprising a second baffle positioned in the air chamberattached to the housing and wherein the second baffle directs air to thekill zone.
 19. The air purifying device of claim 14, wherein UV-C lightfixture emits light capable of killing bacteria, viruses and microbes.20. The air purifying device of claim 18, further comprising a thirdbaffle positioned in the air chamber wherein at least one of the baffleor the second baffle accommodates a UV-reflective material.